X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fmath%2Fscalbn.c;h=530e07c79f051aab246f39b31bfa1571699a8f57;hb=5fc1487832e16aa2119e735a388d5f36c8c139e2;hp=003141e3c14a9a8f59ec68407ca719c9f7d6de8b;hpb=c4359e01303da2755fe7e8033826b132eb3659b1;p=musl

diff --git a/src/math/scalbn.c b/src/math/scalbn.c
index 003141e3..530e07c7 100644
--- a/src/math/scalbn.c
+++ b/src/math/scalbn.c
@@ -1,33 +1,31 @@
-#include "libm.h"
+#include <math.h>
+#include <stdint.h>
 
 double scalbn(double x, int n)
 {
-	double scale;
+	union {double f; uint64_t i;} u;
+	double_t y = x;
 
 	if (n > 1023) {
-		x *= 0x1p1023;
+		y *= 0x1p1023;
 		n -= 1023;
 		if (n > 1023) {
-			x *= 0x1p1023;
+			y *= 0x1p1023;
 			n -= 1023;
-			if (n > 1023) {
-				STRICT_ASSIGN(double, x, x * 0x1p1023);
-				return x;
-			}
+			if (n > 1023)
+				n = 1023;
 		}
 	} else if (n < -1022) {
-		x *= 0x1p-1022;
+		y *= 0x1p-1022;
 		n += 1022;
 		if (n < -1022) {
-			x *= 0x1p-1022;
+			y *= 0x1p-1022;
 			n += 1022;
-			if (n < -1022) {
-				STRICT_ASSIGN(double, x, x * 0x1p-1022);
-				return x;
-			}
+			if (n < -1022)
+				n = -1022;
 		}
 	}
-	INSERT_WORDS(scale, (uint32_t)(0x3ff+n)<<20, 0);
-	STRICT_ASSIGN(double, x, x * scale);
+	u.i = (uint64_t)(0x3ff+n)<<52;
+	x = y * u.f;
 	return x;
 }